CN116279738A - Frame and baby stroller - Google Patents

Abstract

The present disclosure relates to a frame and stroller. The frame includes: the front foot group comprises a front foot rod, a front wheel group arranged at the lower end of the front foot rod and a front foot joint arranged at the upper end of the front foot rod; the rear foot group comprises two rear foot rods, two rear wheel groups respectively arranged at the lower ends of the two rear foot rods and two rear foot covers respectively arranged at the upper ends of the two rear foot rods; the handle group comprises a handle bar, a handrail arranged at the upper end of the handle bar and a handle joint arranged at the lower end of the handle bar, wherein the front foot joint, the two rear foot covers and the handle joint are coaxially connected through a joint shaft, the upper end of the rear foot bar is hinged with the rear foot cover at the same side through a hinge shaft, and the relative rotation angles of the front foot joint and the rear foot cover are different under the unfolding state and the folding state of the frame, so that the outer contour surfaces of different parts of the front foot joint are in contact with the upper end of the rear foot bar, and the rear foot bar swings to different angles relative to the rear foot cover. The folding device can achieve smaller folding size and has higher structural reliability.

Description

Frame and baby stroller

Technical Field

The present disclosure relates to the field of strollers, and more particularly to a frame and stroller.

Background

In order to facilitate storage of the stroller, most existing strollers can fold the front leg group, the rear leg group and the handle group in the front-rear direction. In order to further reduce the size of the stroller after folding, some related art have a sliding seat on the front leg assembly and a linkage rod connecting the rear leg assembly and the sliding seat. Therefore, when the front foot group is folded, the linkage rod is driven by the sliding of the sliding seat, and the two rear foot rods in the rear foot group are folded inwards in the left-right direction by the linkage rod, so that the folding size in the left-right direction is reduced.

Disclosure of Invention

The inventor finds that, although the baby stroller in the related art can realize inward folding of the rear foot rod in the left-right direction, the matching structure of the sliding seat and the linkage rod is poor in reliability and easy to damage when used for a long time.

In view of this, the embodiments of the present disclosure provide a frame and a stroller, which can achieve a smaller folding size and have a higher structural reliability.

In one aspect of the present disclosure, there is provided a frame comprising:

the front foot group comprises a front foot rod, a front wheel group arranged at the lower end of the front foot rod and a front foot joint arranged at the upper end of the front foot rod;

the rear foot group comprises two rear foot rods, two rear wheel groups respectively arranged at the lower ends of the two rear foot rods and two rear foot covers respectively arranged at the upper ends of the two rear foot rods; and

a handle group comprising a handle bar, a handrail arranged at the upper end of the handle bar and a handle joint arranged at the lower end of the handle bar,

the front foot joint, the two rear foot covers and the handle joint are coaxially connected through joint shafts, the upper ends of the rear foot rods are hinged with the rear foot covers on the same side through hinge shafts, and under the unfolding state and the folding state of the frame, the relative rotation angles of the front foot joint and the rear foot covers are different, so that the outer contour surfaces of different parts of the front foot joint are contacted with the upper ends of the rear foot rods, and the rear foot rods swing to different angles relative to the rear foot covers.

In some embodiments, the outer contoured surface of the forefoot joint includes a first outer contoured surface and a second outer contoured surface, the first outer contoured surface being a greater distance from the axis of rotation of the forefoot joint than the second outer contoured surface;

in the unfolded state of the frame, the first outer contour surface is abutted against the upper end of the rear foot rod so that the rear foot rod swings outwards in the left-right direction of the frame, and the overall width of the two rear wheel sets in the left-right direction of the frame is larger than that of the front wheel set in the left-right direction of the frame;

in the folded state of the frame, the second outer contour surface is abutted against the upper end of the rear foot rod, so that the rear foot rod swings inwards in the left-right direction of the frame, and the overall width of the two rear wheel sets in the left-right direction of the frame is smaller than that of the front wheel set in the left-right direction of the frame.

In some embodiments, the axis of the hinge shaft between the hindfoot lever and the hindfoot cover is perpendicular to the axis of the articulation shaft.

In some embodiments, the first outer contoured surface transitions smoothly with the second outer contoured surface, the first outer contoured surface being a convex rounded surface.

In some embodiments, the inner side of the rear foot cover is provided with a first blocking block and a second blocking block, the front foot joint is provided with a third blocking block, the handle group further comprises a joint cover, the joint cover is fixedly connected with the handle joint, the joint cover is provided with a blocking groove, and the second blocking block is inserted in the blocking groove and can slide in the blocking groove;

in the unfolded state of the frame, the first blocking piece is abutted against the third blocking piece so as to limit the rotation of the rear foot cover relative to the front foot joint in a first direction, and the second blocking piece is abutted against one circumferential groove wall of the blocking groove so as to limit the rotation of the rear foot cover relative to the joint cover in a second direction, wherein the second direction is the opposite direction of the first direction;

during the process of folding the frame from the unfolded state to the folded state, the joint cover rotates relative to the rear foot cover in the second direction, so that the blocking groove slides relative to the second blocking block, and the restriction of the rotation of the rear foot cover relative to the joint cover in the second direction is released;

in the folded state of the frame, the first blocking piece abuts against the third blocking piece to limit the rear foot cover to rotate in the second direction relative to the front foot joint, and the second blocking piece abuts against the circumferential groove wall on the other side of the blocking groove to limit the rear foot cover to rotate in the first direction relative to the joint cover.

In some embodiments, the handle set further comprises:

the rotating block is rotationally connected with the handle joint through the joint shaft; and

a first slider slidably disposed within the handle joint and capable of extending and retracting with respect to the handle joint,

wherein, in the unfolded state of the frame, the first sliding block extends out from the handle joint and abuts against the front foot joint so as to limit the relative rotation between the front foot joint and the handle joint;

in the process of folding the frame from the unfolded state to the folded state, the rotating block is rotated to drive the first sliding block to retract into the handle joint, so that the restriction of relative rotation between the forefoot joint and the handle joint is relieved.

In some embodiments, the handle set further comprises:

the locking block is arranged in the handle rod in a locking manner;

the shifting block is arranged in the handle joint, the first end of the shifting block is abutted against the rotating block, and the second end of the shifting block is abutted against the locking block; and

the unlocking key is arranged on the handle rod, is connected with the locking block through the locking element and is configured to enable the locking element to be separated from a position enabling the locking block to be locked relative to the handle rod after external force is applied, so that the locking block pushes the shifting block to move towards the rotating block.

In some embodiments, the rotary block has a first guide chute located on a side of the articulation shaft away from the dial block, the first slider has a pin hole and a second guide chute, the handle set further includes a pin rod passing through the first guide chute and the pin hole, the pin rod and the first guide chute are relatively slidable along a length direction of the first guide chute, and the articulation shaft passes through the second guide chute and is slidable along a length direction of the second guide chute; and in the rotating process of the rotating block, the pin rod drives the first sliding block to extend or retract relative to the handle joint.

In some embodiments, the handle set further comprises:

a first elastic member disposed between the first slider and the handle joint and configured to extend the first slider outward with respect to the handle joint.

In some embodiments, the frame further comprises:

a swivel base having one end articulated with the front foot joint, configured to support a child car seat, and rotatably connected with a bottom of the child car seat;

the sliding sleeve is sleeved on the front foot rod in a sliding manner; and

the two ends of the support rod are hinged with the other end of the rotating seat and the sliding sleeve respectively, and the support rod is configured to form a support triangle with the rotating seat and the front foot rod in the unfolded state of the frame, and is completely unfolded with the rotating seat and attached to the front foot rod in the folded state of the frame.

In some embodiments, the forefoot set further comprises:

the fixed seat is fixedly arranged in the front foot rod;

the second sliding block is arranged in the front foot rod and is slidably connected with the fixed seat, and the second sliding block is provided with a first end contacted with the handle group and a second end provided with a driving inclined plane; and

a third slider arranged in the front foot bar and slidably connected with the fixed seat, the third slider having a latch portion and a wedge-shaped surface contacting with the driving inclined surface of the second slider,

in the unfolded state of the frame, the bolt part of the third sliding block extends out of the fixed seat and is inserted into the front foot rod and the through hole on the sliding sleeve so as to lock the position of the sliding sleeve on the front foot rod;

during the folding and unfolding process of the frame from the unfolding state to the folding state, the second sliding block is pushed to move through the rotation of the handle group, so that the bolt part of the third sliding block is retracted from the front foot rod and the through hole on the sliding sleeve through the wedge-shaped fit of the driving inclined surface of the second sliding block and the wedge-shaped surface of the third sliding block, and the position of the sliding sleeve on the front foot rod is unlocked.

In some embodiments, the forefoot set further comprises:

and the second elastic piece is arranged between the fixed seat and the second sliding block and is configured to enable the first end of the second sliding block to maintain contact with the handle group.

In one aspect of the present disclosure, there is provided a stroller comprising: the frame.

Therefore, according to the embodiment of the disclosure, the hinge shaft is used for realizing the hinge connection between the upper end of the rear foot rod and the rear foot cover, and the relative rotation angles of the front foot joint and the rear foot cover are different in the unfolded state and the folded state of the frame, so that the outer contour surfaces of different parts of the front foot joint are contacted with the upper end of the rear foot rod, and the rear foot rod swings to different angles relative to the rear foot cover, thereby realizing the change of the swing angle of the rear foot rod relative to the rear foot cover while folding and unfolding the frame, and allowing the smaller folded size to be realized by swinging the rear foot rod. Compared with the matching structure of the sliding seat and the linkage rod in the related art, the sliding seat and linkage rod disclosed by the embodiment of the disclosure has better structural reliability and longer service life.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of some embodiments of a stroller of the present disclosure;

FIG. 2 is a schematic structural view of some embodiments of a frame of the present disclosure;

FIG. 3 is an exploded structural schematic view of some embodiments of the stroller of the present disclosure;

FIG. 4 is a schematic illustration of an assembled configuration of some embodiments of the disclosed frame near an articulation axis;

FIG. 5 is a schematic view of a rear foot bar swinging to different angles relative to a rear foot cover in some embodiments of the disclosed frame;

FIG. 6 is a schematic illustration of a collapsed configuration of some embodiments of the disclosed frame;

FIG. 7 is a schematic illustration of an exploded construction of a rear foot set in some embodiments of the disclosed frame;

FIG. 8 is a schematic structural view of a rear foot cover in some embodiments of the disclosed frame;

fig. 9 (a) and (b) are schematic views of the rear foot cover rotated to different angles relative to the front foot joint and the joint cover, respectively, in some embodiments of the disclosed frame;

FIG. 10 is a schematic illustration of an exploded construction of a handlebar assembly in some embodiments of the disclosed frame;

FIG. 11 is a schematic illustration of an exploded construction of a front set in some embodiments of a frame of the present disclosure;

FIG. 12 is a schematic cross-sectional view of some embodiments of the disclosed frame near an articulation axis;

FIG. 13 is a schematic cross-sectional view of the handle set of FIG. 12 rotated a predetermined angle toward the rear leg set;

fig. 14 (a) - (l) are structural schematic diagrams of some components in some embodiments of the disclosed frame, respectively.

It should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale. Further, the same or similar reference numerals denote the same or similar members.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In this disclosure, when a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to the other devices without intervening devices, or may be directly connected to the other devices without intervening devices.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

Fig. 1 is a schematic structural view of some embodiments of a stroller of the present disclosure. Fig. 2 is a schematic structural view of some embodiments of the disclosed frame. Referring to fig. 1 and 2, in combination with fig. 3-14, a frame and stroller are provided in accordance with an embodiment of the present disclosure. The frame can be used for baby strollers, and can also be used for other types of strollers. The frame includes: a forefoot set 10, a rearfoot set 20 and a handle set 30. A child seat 50 may also be mounted over the front set 10 for infant or child seating.

The forefoot set 10 comprises a forefoot bar 11, a forefoot wheel set 12 arranged at the lower end of the forefoot bar 11 and a forefoot joint 13 arranged at the upper end of the forefoot bar 11. The rear leg group 20 includes two rear leg bars 21, two rear leg wheel groups 22 respectively provided at lower ends of the two rear leg bars 21, and two rear leg covers 23 respectively provided at upper ends of the two rear leg bars 21. The handle group 30 includes a handle bar 31, a handrail 32 provided at an upper end of the handle bar 31, and a handle joint 33 provided at a lower end of the handle bar 31.

The front foot joint 13, the two rear foot covers 23 and the handle joint 33 are coaxially connected through a joint shaft 40, and the upper end of the rear foot rod 21 is hinged with the rear foot cover 23 on the same side through a hinge shaft 24. In the unfolded state and the folded state of the frame, the relative rotation angles of the front foot joint 13 and the rear foot cover 23 are different, so that the outer contour surfaces of different parts of the front foot joint 13 are contacted with the upper end of the rear foot bar 21, and the rear foot bar 21 swings to different angles relative to the rear foot cover 23.

The hinge shaft is used for realizing the hinge connection between the upper end of the rear foot rod and the rear foot cover, and the relative rotation angles of the front foot joint and the rear foot cover are different in the unfolding state and the folding state of the frame, so that the outer contour surfaces of different parts of the front foot joint are contacted with the upper end of the rear foot rod, the rear foot rod swings to different angles relative to the rear foot cover, the change of the swing angle of the rear foot rod relative to the rear foot cover can be realized when the frame is folded and unfolded, and the smaller folding size can be realized by swinging the rear foot rod. Compared with the matching structure of the sliding seat and the linkage rod in the related art, the sliding seat and linkage rod disclosed by the embodiment of the disclosure has better structural reliability and longer service life.

Referring to fig. 4-6, in some embodiments, the outer contoured surface of the forefoot joint 13 includes a first outer contoured surface 131 and a second outer contoured surface 132, the first outer contoured surface 131 being a greater distance from the axis of rotation of the forefoot joint 13 than the second outer contoured surface 132. This assumes a state in which the first outer contour surface 131 is more convex outward than the second outer contour surface 132. The first outer contour surface 131 and the second outer contour surface 132 may be adjacently disposed in the circumferential direction of the forefoot joint 13 so as to achieve a change in the contact position of the upper end of the hindfoot lever 21 with the first outer contour surface 131 or the second outer contour surface 132 when the hindfoot lever 21 rotates relative to the forefoot joint 13.

In the unfolded state of the frame, the first outer contour surface 131 abuts against the upper end of the rear foot bar 21 so that the rear foot bar 21 swings outwardly in the left-right direction of the frame, and the overall width of the two rear wheel groups 22 in the left-right direction of the frame is larger than the width of the front wheel group 12 in the left-right direction of the frame. In fig. 7, it can be seen that the portion 212 of the upper end of the hindfoot lever 21, which is capable of contacting the forefoot joint, is located on the underside of the hinge shaft 24, and when the portion 212 is subjected to a downward or rightward pressing force from the first outer contoured surface 131, which is more outwardly convex, the entire hindfoot lever 21 is rotated counterclockwise about the hinge shaft 24, causing the hindfoot lever 21 to be outwardly unfolded. At this time, the portion 214 at the upper end of the rear leg 21 can be locked into the recess provided in the rear leg cover 23, thereby ensuring stability in the unfolded state.

In the collapsed state of the frame, the second outer contour surface 132 abuts against the upper end of the rear foot bar 21 so that the rear foot bar 21 swings inward in the left-right direction of the frame, and the overall width of the two rear wheel groups 22 in the left-right direction of the frame is smaller than the width of the front wheel group 12 in the left-right direction of the frame. When the user folds the frame, the front foot bar 11 and the rear foot bar 21 rotate relatively, so that the part 212 at the upper end of the rear foot bar 21 rotates from the contact position with the first outer contour surface 131 to the contact position with the second outer contour surface 132, and the second outer contour surface 132 does not protrude outwards or protrudes to a small extent, so that the rear foot bar 21 obtains a certain swing allowance and becomes a free state capable of rotating inwards, and accordingly, in the folded state of the frame, the two rear wheel sets 22 are obtained by swinging inwards to obtain a smaller overall width in the left-right direction of the frame.

By the swinging of the rear foot bar 21 relative to the rear foot cover 23, the two rear wheel sets can realize wider and more stable supporting effect in the unfolded state of the frame and occupy less space in the folded state of the frame. Compared with the related art, the matching structure is simple and reliable, and the first outer contour surface and the second outer contour surface can be integrally formed on the forefoot joint, so that the cost is low.

Referring to fig. 4-7, in some embodiments, the axis of the hinge shaft 24 between the rear foot bar 21 and the rear foot cover 23 is perpendicular to the axis of the articulation shaft 40 and perpendicular to the length direction of the rear foot bar 21. The whole frame can be folded in a plane range perpendicular to the axis of the joint shaft 40, and can also be folded in a plane range perpendicular to the axis of the hinge shaft 24, and the axis of the hinge shaft 24 is perpendicular to the axis of the joint shaft 40, so that the overall size after folding is more compact. In addition, the axis of the hinge shaft 24 may be perpendicular to the longitudinal direction of the rear foot bar 21.

In order to smooth the switching of the contact position of the upper end of the rear foot bar 21 with the first outer contour surface 131 and the second outer contour surface 132, referring to fig. 4 and 11-13, in some embodiments, the first outer contour surface 131 smoothly transitions with the second outer contour surface 132, the first outer contour surface 131 being a convex arc-shaped convex surface. The second outer contour surface 132 may or may not be designed as a convex surface.

Referring to fig. 4, 8, 9 and 14, in some embodiments, the inner side of the rear foot cover 23 has a first blocking piece 231 and a second blocking piece 232, the front foot joint 13 has a third blocking piece 133, the handle group 30 further includes a joint cover 34, the joint cover 34 is fixedly connected with the handle joint 33, the joint cover 34 has a blocking groove 341, and the second blocking piece 232 is inserted into the blocking groove 341 and is slidable in the blocking groove 341. The length of the blocking groove 341 in the circumferential direction is longer than the length of the second blocking piece 232 in the circumferential direction, so that the second blocking piece 232 slides in the blocking groove 341 when the rear foot cover 23 is rotated relative to the handle joint 13.

In the unfolded state of the frame, the first blocking piece 231 abuts against the third blocking piece 133 to limit the rotation of the rear foot cover 23 relative to the front foot joint 13 in a first direction, and the second blocking piece 232 abuts against one circumferential groove wall of the blocking groove 341 to limit the rotation of the rear foot cover 23 relative to the joint cover 34 in a second direction, wherein the second direction is the opposite direction of the first direction. In this way, the rear foot cover 23 and the front foot joint 13 cannot rotate relatively in the unfolded state of the frame, and the stability of the frame in the unfolded state is ensured. The first direction may be the direction in which the rear leg group 20 rotates toward the handle group 30, and the second direction may be the direction in which the rear leg group 20 rotates toward the front leg group 10.

During the folding of the frame from the unfolded state to the folded state, the joint cover 34 rotates relative to the rear foot cover 23 in the second direction, so that the blocking groove 341 slides relative to the second blocking piece 232, and the restriction of the rotation of the rear foot cover 23 relative to the joint cover 34 in the second direction is released. At this time, the rear foot group 20 can rotate toward the front foot group 10, so as to achieve folding between the rear foot group 20 and the front foot group 10.

In the folded state of the frame, the first blocking piece 231 abuts against the third blocking piece 133 to limit the rotation of the rear foot cover 23 relative to the front foot joint 13 in the second direction, and the second blocking piece 232 abuts against the circumferential groove wall on the other side of the blocking groove 341 to limit the rotation of the rear foot cover 23 relative to the joint cover 34 in the first direction. The rear leg group 20 is restricted from rotating in a plane perpendicular to the axis of the joint shaft 40, and only the rear leg bar 21 is allowed to swing inward relative to the rear leg cover 23, thereby realizing inward folding of the rear leg bar 21. Also, referring to fig. 5, when the entire frame is lifted, the hinge shaft 24 is substantially parallel to the ground, and the rear foot bar 21 and the rear wheel group 22 swing inward from the position B to the position a by gravity, thereby automatically achieving inward folding of the rear foot bar.

Referring to fig. 10 and 12-13, in some embodiments, the handle set 30 further includes: a rotating block 35 and a first slider 36. The turning block 35 is rotatably connected to the handle joint 33 via the joint shaft 40. A first slider 36 is slidably disposed within the handle joint 33 and is capable of extending and retracting relative to the handle joint 33.

Referring to fig. 12, in the unfolded state of the frame, the first slider 36 protrudes from the handlebar joint 33 and abuts against the forefoot joint 13 to limit the relative rotation between the forefoot joint 13 and the handlebar joint 33. Referring to fig. 13, during the folding of the frame from the unfolded state to the folded state, the first slider 36 is driven to retract into the handle joint 33 by rotating the rotating block 35, so that the restriction of the relative rotation between the forefoot joint 13 and the handle joint 33 is released.

To control the rotation of the rotating block 35 to adjust the position of the first slider 36 relative to the handle joint 33, referring to fig. 3, 10 and 12, in some embodiments, the handle set 30 further includes: locking block 37, dial block 38 and unlocking key 39. A locking block 37 is lockably provided in the handle bar 31. A dial 38 is provided in the handle joint 33, and the dial 38 has a first end abutting against the rotary block 35 and a second end abutting against the lock block 37. An unlocking key 39 is provided on the handle bar 31 and is connected to the locking block 37 by a locking element 391. The unlocking key 39 can disengage the locking element 391 from the position in which the locking block 37 is locked with respect to the handle bar 31 after receiving an external force, thereby allowing the locking block 37 to push the movement of the dial 38 toward the rotation block 35.

Unlocking key 39 may be provided on handle bar 32 at the uppermost side of handle bar 31, for example, on the lower side surface of handle bar 32, to facilitate grasping by the user. The handle bar 31 may be configured as a telescopic bar structure, such as a telescopic outer bar 312 and a telescopic inner bar 311 in fig. 3, the telescopic inner bar 311 is fixedly connected with the handle 32, the lower end of the telescopic outer bar 312 is fixedly connected with the handle joint 33, and the locking block 37 may be fixedly connected with the lower end of the telescopic inner bar 311. In the unfolded state of the frame, the lock element 391 can lock the position of the lock block 37 or the telescopic inner rod 311 relative to the telescopic outer rod 312.

When the user presses the unlocking key 39, the unlocking key 39 releases the locking element 39 from the locking position by a flexible member such as a wire rope, so that the locking block 37 and the telescopic inner rod 311 can move with respect to the telescopic outer rod 312. User actuation of the handle 32 moves the locking block 37 toward the handle joint 33, and the locking block 37 pushes the dial 38 toward the rotational block 35. Accordingly, the rotating block 35 rotates under the pushing action of the shifting block 38 to drive the first sliding block 36 to retract inwards, and the first sliding block is separated from the position for limiting the relative rotation between the front foot joint 13 and the handle joint 33. This realizes release of the rotation restriction between the forefoot joint 13 and the handle joint 33 after the unlocking key is pressed.

In order for the turning block 35 to more effectively drive the sliding of the first slider 36 with respect to the handle joint 33, referring to fig. 10 and 12-14, in some embodiments, the turning block 35 has a first guide chute 351 located on a side of the joint shaft 40 remote from the dial 38, the first slider 36 having a pin hole 361 and a second guide chute 362. The handle group 30 further includes a pin rod 392 passing through the first guide sliding groove 351 and the pin hole 361, the pin rod 392 and the first guide sliding groove 351 can slide relatively along the length direction of the first guide sliding groove 351, and the joint shaft 40 passes through the second guide sliding groove 362 and can slide along the length direction of the second guide sliding groove 362; during the rotation of the rotating block 35, the pin rod 392 drives the first slider 36 to extend or retract relative to the handle joint 33.

In fig. 14 (h) and (i), the first guide sliding groove 351 is located at one side of the shaft hole 352 for passing through the joint shaft 40, the pin rod 392 passes through the pin hole 361 of the first slider 36 and the first guide sliding groove 351 of the rotating block 35, and the joint shaft 40 passes through the shaft hole 352 of the rotating block 35 and the second guide sliding groove 362 of the first slider 36. When the turning block 35 is turned, the pin 392 is pushed by the groove wall of the first guide chute 351, and the pin 392 slides in the first guide chute 351 under the restriction of the pin hole 361 of the first slider 36 which can slide only with respect to the handle joint 13, thereby driving the first slider 36 to slide.

Referring to fig. 12, the handle set 30 may further include a first resilient member 393, such as a spring or the like, disposed between the first slider 36 and the handle joint 33 such that the first slider 36 automatically extends outwardly relative to the handle joint 33 to a position limiting relative rotation between the forefoot joint 13 and the handle joint 33 when the rotational block 35 is rotated counterclockwise.

Referring to fig. 2-4 and 11-12, in some embodiments, the frame further comprises: swivel seat 51, sliding sleeve 52 and bracing piece 53. One end of the swivel base 51 is hinged to the forefoot joint 13. The swivel seat 51 can support the child car seat 50 and is rotatably connected to the bottom of the child car seat 50. The child car seat 50 can be adjusted to a forward, rearward or sideways riding condition by the swivel seat 51. Foot bars 54 for supporting the legs of the child may also be provided on the swivel base 51. A foot rest 211 for supporting the legs of the child seated in the backward direction may be provided on the rear foot bar 21.

The sliding sleeve 52 is slidably sleeved on the front foot bar 11. Both ends of the supporting rod 53 are hinged to the other end of the rotating seat 51 and the sliding sleeve 52 respectively. The support rod 53 may form a support triangle with the swivel base 51 and the front foot bar 11 in the unfolded state of the frame, and may be fully unfolded with the swivel base 51 and attached to the front foot bar 11 in the folded state of the frame. The matching structure of the rotating seat 51, the sliding sleeve 52 and the supporting rod 53 can not only stably and reliably support the baby seat 50 in the unfolded state of the frame, but also be attached to the front foot rod 11 in the folded state of the frame, so that the occupied space after folding is reduced.

Referring to fig. 11-14, in some embodiments, the forefoot set 10 further includes: a fixed seat 14, a second slide block 15 and a third slide block 16. A fixed seat 14 is fixedly arranged in the front foot bar 11, a second sliding block 15 is arranged in the front foot bar 11 and is slidably connected with the fixed seat 14, and the second sliding block 15 is provided with a first end contacted with the handle group 30 and a second end provided with a driving inclined plane 151. A third slider 16 is provided in the front foot bar 11 and slidably connected to the fixed base 14, the third slider 16 having a latch portion 161 and a wedge surface 162 contacting the driving slope 151 of the second slider 15.

In the unfolded state of the frame, the bolt portion 161 of the third slider 16 extends out of the fixing seat 14 and is inserted into the through holes on the front foot bar 11 and the sliding sleeve 52, so as to lock the sliding sleeve 52 at the position of the front foot bar 11.

During the folding of the frame from the unfolded state to the folded state, the second slider 15 is pushed to move by the rotation of the handle group 30, so that the bolt part 161 of the third slider 16 is retracted from the through holes on the front foot bar 11 and the sliding sleeve 52 through the wedge-shaped engagement of the driving inclined surface 151 of the second slider 15 and the wedge-shaped surface 162 of the third slider 16, thereby unlocking the position of the sliding sleeve 52 on the front foot bar 11. Thus, unlocking of the sliding sleeve 52 is achieved by rotation of the handle set 30, and the swivel base 51 and the support rod 53 automatically flatten and fit onto the forefoot lever 11 under the action of self gravity. Compared with the mode that the rotating seat and the handle group, the front foot group and the rear foot group of the frame are required to be respectively folded in the related art, the folding process is simplified, the sliding sleeve is synchronously unlocked when the handle group is lifted to fold the handle group, the front foot group and the rear foot group of the frame, and the rotating seat and the supporting rod are automatically folded.

To more reliably unlock the sliding sleeve 52 by rotation of the handle assembly 30, referring to fig. 11 and 12, in some embodiments, the forefoot assembly 10 further includes: a second elastic member 17. A second elastic member 17 is provided between the fixed seat 14 and the second slider 15, configured to maintain the first end of the second slider 15 in contact with the handle group 30.

The various embodiments of the frame described above of the present disclosure are applicable to stroller, and thus the present disclosure also provides stroller embodiments including any of the frame embodiments described above.

Referring to fig. 1-14, the cooperation of the various components during an example of a frame from an extended condition to a collapsed condition is described below.

In the unfolded state of the frame, the user presses the unlocking key 39 on the handle 32 by hand, the unlocking key 39 drives the locking element 39 to be separated from the locking position through the steel wire rope, at this time, the user pushes the handle 32 downwards to enable the telescopic inner rod 311 to retract into the telescopic outer rod 312, and the locking block 37 is driven to move towards the handle joint 33.

The locking block 37 pushes the shifting block 37 to move towards the handle joint 33, the shifting block 37 pushes the rotating block 35 to rotate, and the rotating block 35 rotates to drive the first sliding block 36 to retract inwards, so that the position of the relative rotation between the front foot joint 13 and the handle joint 33 is separated from the position of limiting the relative rotation.

Then, the user lifts the frame to enable the handle group and the front foot group to rotate towards the rear foot group under the action of gravity so as to be close. In this process, the handle joint 33 or the first slider 36 can abut against the second slider 15, so that the second slider 15 moves towards the front wheel set 13, compresses the second elastic member 17, and drives the latch portion 161 of the third slider 16 to retract from the through hole on the front foot rod 11 and the sliding sleeve 52 through the driving inclined surface 151, thereby unlocking the sliding sleeve 52 on the front foot rod 11. The unlocking of the sliding sleeve 52 causes the rotating seat 51 and the supporting rod 53 to flatten under the gravity, and the sliding sleeve 52 slides downwards along the front foot rod 11, so as to realize the folding of the supporting structure of the baby seat.

When the handle group and the front foot group are close to the position adjacent to the rear foot group, the rear foot rod and the rear foot group in the rear foot group swing inwards relative to the rear foot cover under the action of self gravity, so that the distance between the two rear foot groups is further reduced, and the folding state shown in fig. 6 is formed.

Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (13)

1. A vehicle frame, comprising:

a front foot group (10) comprising a front foot bar (11), a front wheel group (12) arranged at the lower end of the front foot bar (11) and a front foot joint (13) arranged at the upper end of the front foot bar (11);

the rear foot group (20) comprises two rear foot rods (21), two rear wheel groups (22) respectively arranged at the lower ends of the two rear foot rods (21) and two rear foot covers (23) respectively arranged at the upper ends of the two rear foot rods (21); and

a handle group (30) comprising a handle bar (31), a handrail (32) arranged at the upper end of the handle bar (31) and a handle joint (33) arranged at the lower end of the handle bar (31),

the front foot joint (13), the two rear foot covers (23) and the handle joint (33) are coaxially connected through a joint shaft (40), the upper end of the rear foot rod (21) is hinged with the rear foot cover (23) on the same side through a hinge shaft (24), and under the unfolding state and the folding state of the frame, the relative rotation angles of the front foot joint (13) and the rear foot cover (23) are different, so that the outer contour surfaces of different parts of the front foot joint (13) are contacted with the upper end of the rear foot rod (21), and the rear foot rod (21) swings to different angles relative to the rear foot cover (23).

2. The frame according to claim 1, characterized in that the outer contour surface of the forefoot joint (13) comprises a first outer contour surface (131) and a second outer contour surface (132), the distance of the first outer contour surface (131) from the axis of rotation of the forefoot joint (13) being greater than the distance of the second outer contour surface (132) from the axis of rotation of the forefoot joint (13);

in the unfolded state of the frame, the first outer contour surface (131) is abutted against the upper end of the rear foot rod (21) so that the rear foot rod (21) swings outwards in the left-right direction of the frame, and the overall width of the two rear wheel groups (22) in the left-right direction of the frame is larger than the width of the front wheel group (12) in the left-right direction of the frame;

in the folded state of the frame, the second outer contour surface (132) is abutted against the upper end of the rear foot rod (21) so that the rear foot rod (21) swings inwards in the left-right direction of the frame, and the overall width of the two rear wheel sets (22) in the left-right direction of the frame is smaller than the width of the front wheel set (12) in the left-right direction of the frame.

3. The frame according to claim 2, characterized in that the axis of the hinge shaft (24) between the rear foot bar (21) and the rear foot cover (23) is perpendicular to the axis of the articulation shaft (40).

4. The frame according to claim 2, characterized in that the first outer contour surface (131) and the second outer contour surface (132) are smoothly transitioned, the first outer contour surface (131) being a convex surface of circular arc shape.

5. The frame according to claim 1, characterized in that the inner side of the rear foot cover (23) is provided with a first blocking piece (231) and a second blocking piece (232), the front foot joint (13) is provided with a third blocking piece (133), the handlebar group (30) further comprises a joint cover (34), the joint cover (34) is fixedly connected with the handlebar joint (33), the joint cover (34) is provided with a blocking groove (341), and the second blocking piece (232) is inserted in the blocking groove (341) and can slide in the blocking groove (341);

in the unfolded state of the frame, the first blocking block (231) abuts against the third blocking block (133) to limit the rotation of the rear foot cover (23) relative to the front foot joint (13) in a first direction, and the second blocking block (232) abuts against one circumferential groove wall of the blocking groove (341) to limit the rotation of the rear foot cover (23) relative to the joint cover (34) in a second direction, wherein the second direction is the opposite direction of the first direction;

during the folding of the frame from the unfolded state to the folded state, the joint cover (34) rotates relative to the rear foot cover (23) in the second direction, so that the blocking groove (341) slides relative to the second blocking block (232) and the limit of the rotation of the rear foot cover (23) relative to the joint cover (34) in the second direction is released;

in the folded state of the frame, the first blocking piece (231) abuts against the third blocking piece (133) to limit the rear foot cover (23) to rotate in the second direction relative to the front foot joint (13), and the second blocking piece (232) abuts against the circumferential groove wall on the other side of the blocking groove (341) to limit the rear foot cover (23) to rotate in the first direction relative to the joint cover (34).

6. The frame according to claim 1, characterized in that said handlebar group (30) further comprises:

a rotating block (35) rotatably connected to the handle joint (33) via the joint shaft (40); and

a first slider (36) slidably disposed within the handle joint (33) and capable of extending and retracting with respect to the handle joint (33),

wherein in the unfolded state of the frame, the first slider (36) protrudes from the handlebar joint (33) and abuts against the forefoot joint (13) to limit relative rotation between the forefoot joint (13) and the handlebar joint (33);

during the folding of the frame from the unfolded state to the folded state, the rotating block (35) is rotated to drive the first sliding block (36) to retract into the handle joint (33) so as to release the restriction of relative rotation between the forefoot joint (13) and the handle joint (33).

7. The frame according to claim 6, wherein the handlebar group (30) further comprises:

a locking block (37) which is lockably provided in the handle bar (31);

a shifting block (38) arranged in the handle joint (33), wherein a first end of the shifting block (38) is abutted against the rotating block (35), and a second end of the shifting block is abutted against the locking block (37); and

an unlocking key (39) is provided on the handle bar (31) and is connected to the locking block (37) through a locking element (391), and is configured to disengage the locking element (391) from a position in which the locking block (37) is locked with respect to the handle bar (31) after receiving an external force, thereby causing the locking block (37) to push the movement of the dial block (38) toward the rotation block (35).

8. The frame according to claim 7, characterized in that the turning block (35) has a first guide runner (351) located on a side of the articulation shaft (40) remote from the dial block (38), the first slider (36) has a pin hole (361) and a second guide runner (362), the handle group (30) further includes a pin rod (392) passing through the first guide runner (351) and the pin hole (361), the pin rod (392) and the first guide runner (351) are relatively slidable in a length direction of the first guide runner (351), and the articulation shaft (40) passes through the second guide runner (362) and is slidable in a length direction of the second guide runner (362); in the rotating process of the rotating block (35), the pin rod (392) drives the first sliding block (36) to extend or retract relative to the handle joint (33).

9. The frame according to claim 6, wherein the handlebar group (30) further comprises:

a first elastic member (393) disposed between the first slider (36) and the handle joint (33) and configured to cause the first slider (36) to protrude outward with respect to the handle joint (33).

10. The frame of claim 1, further comprising:

a swivel base (51) having one end hinged to the front foot joint (13), configured to support a child car seat, and rotatably connected to a bottom of the child car seat;

a sliding sleeve (52) slidably sleeved on the front foot rod (11); and

the two ends of the supporting rod (53) are respectively hinged with the other end of the rotating seat (51) and the sliding sleeve (52), and the supporting rod is configured to form a supporting triangle with the rotating seat (51) and the front foot rod (11) in the unfolded state of the frame, and is completely unfolded with the rotating seat (51) and attached to the front foot rod (11) in the folded state of the frame.

11. The frame according to claim 10, characterized in that said front set of feet (10) further comprises:

the fixed seat (14) is fixedly arranged in the front foot rod (11);

a second slider (15) disposed in the front foot bar (11) and slidably connected to the fixed seat (14), the second slider (15) having a first end in contact with the handle group (30) and a second end having a driving ramp (151); and

a third slider (16) disposed in the front foot bar (11) and slidably connected to the fixed base (14), the third slider (16) having a plug portion (161) and a wedge surface (162) contacting with a driving slope (151) of the second slider (15),

wherein, in the unfolded state of the frame, the bolt part (161) of the third sliding block (16) extends out of the fixed seat (14) and is inserted into the through holes on the front foot rod (11) and the sliding sleeve (52) so as to lock the position of the sliding sleeve (52) on the front foot rod (11);

during the folding of the frame from the unfolded state to the folded state, the second sliding block (15) is pushed to move by the rotation of the handle group (30), so that the bolt part (161) of the third sliding block (16) is retracted from the through holes on the front foot rod (11) and the sliding sleeve (52) through the wedge-shaped cooperation of the driving inclined surface (151) of the second sliding block (15) and the wedge-shaped surface (162) of the third sliding block (16), and the position of the sliding sleeve (52) on the front foot rod (11) is unlocked.

12. The frame according to claim 11, characterized in that said front set of feet (10) further comprises:

and a second elastic member (17) disposed between the fixed seat (14) and the second slider (15) and configured to maintain a first end of the second slider (15) in contact with the handle group (30).

13. A stroller, comprising:

a vehicle frame as claimed in any one of claims 1 to 12.

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